# Recent history for Alfred Centauri

5
years
ago
 received downvote on comment Calculating the Riemann tensor for a 3-Sphere
5
years
ago
 received downvote on comment Calculating the Riemann tensor for a 3-Sphere
5
years
ago
 posted a comment Calculating the Riemann tensor for a 3-Sphere
5
years
ago
 posted a comment Calculating the Riemann tensor for a 3-Sphere
6
years
ago
 received upvote on answer Is partial derivative a vector or dual vector?
7
years
ago
 posted an answer Is partial derivative a vector or dual vector?
7
years
ago
 received upvote on answer Is partial derivative a vector or dual vector?
7
years
ago
 received upvote on answer Is partial derivative a vector or dual vector?
7
years
ago
 received upvote on answer Is partial derivative a vector or dual vector?
7
years
ago
 received upvote on answer Is partial derivative a vector or dual vector?
7
years
ago
 received upvote on answer Is partial derivative a vector or dual vector?
7
years
ago
 answer commented on Why particle number operator $\hat{N}$ is $\hat{a}^\dagger\hat{a}$ rather than $\hat{a}\hat{a}^\dagger$?
7
years
ago
 answer commented on Why particle number operator $\hat{N}$ is $\hat{a}^\dagger\hat{a}$ rather than $\hat{a}\hat{a}^\dagger$?
7
years
ago
 answer commented on Why particle number operator $\hat{N}$ is $\hat{a}^\dagger\hat{a}$ rather than $\hat{a}\hat{a}^\dagger$?
7
years
ago
 answer commented on Why particle number operator $\hat{N}$ is $\hat{a}^\dagger\hat{a}$ rather than $\hat{a}\hat{a}^\dagger$?
7
years
ago
 posted an answer Why particle number operator $\hat{N}$ is $\hat{a}^\dagger\hat{a}$ rather than $\hat{a}\hat{a}^\dagger$?
7
years
ago
 received upvote on answer Why particle number operator $\hat{N}$ is $\hat{a}^\dagger\hat{a}$ rather than $\hat{a}\hat{a}^\dagger$?
7
years
ago
 posted a comment Are there moments in particle collision experiments where the particle beam is in open air?
7
years
ago
 posted an answer How to obtain Dirac equation from Schrodinger equation and special relativity?